In Open City Agora you can create views that mix several layers of information from different sources including Open Data and Google Places. You can create your own views with the available layers and share them with the community.
Open City Agora tries to solve the problem with the big amount of geolocalized data that is spread in different places, making possible to show them in one single view, giving extra values to the Places search.
It takes part in the Google Places Api Developer Challenge 2012, you can vote for it in the Gallery: https://developers.google.com/places/challenge/gallery
Google map and bars, lounges, restaurants and clubs etc. Links to reviews. Venues have map with nearby venues. Site also has a Mapchat mashup mixing maps and chat and a Twitter mashup in the members...